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111
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1 -- C974010.A
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2 --
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3 -- Grant of Unlimited Rights
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4 --
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5 -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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6 -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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7 -- unlimited rights in the software and documentation contained herein.
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8 -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
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9 -- this public release, the Government intends to confer upon all
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10 -- recipients unlimited rights equal to those held by the Government.
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11 -- These rights include rights to use, duplicate, release or disclose the
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12 -- released technical data and computer software in whole or in part, in
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13 -- any manner and for any purpose whatsoever, and to have or permit others
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14 -- to do so.
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15 --
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16 -- DISCLAIMER
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17 --
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18 -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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19 -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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20 -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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21 -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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22 -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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23 -- PARTICULAR PURPOSE OF SAID MATERIAL.
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24 --*
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25 --
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26 -- OBJECTIVE:
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27 -- Check that the abortable part of an asynchronous select statement
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28 -- is not started if the triggering statement is a task entry call to
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29 -- a task that has already terminated.
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30 --
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31 -- Check that Tasking_Error is properly propagated to the asynchronous
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32 -- select statement and thus the sequence of statements of the triggering
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33 -- alternative is not executed after the abortable part is left.
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34 --
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35 -- Check that Tasking_Error is re-raised immediately following the
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36 -- asynchronous select.
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37 --
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38 -- TEST DESCRIPTION:
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39 --
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40 -- Use a small subset of the base Automated Teller Machine simulation
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41 -- which is shown in greater detail in other tests of this series.
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42 -- Declare a main procedure containing an asynchronous select with a task
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43 -- entry call as triggering statement. Ensure that the task is
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44 -- terminated before the entry call. Use stripped down versions of
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45 -- the called procedures to check the correct path in the test.
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46 --
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47 --
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48 -- CHANGE HISTORY:
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49 -- 06 Dec 94 SAIC ACVC 2.0
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50 --
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51 --!
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52
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53 package C974010_0 is -- Automated teller machine abstraction.
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54
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55
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56 Transaction_Canceled : exception;
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57
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58 type Key_Enum is (None, Cancel, Deposit, Withdraw);
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59
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60 type Card_Number_Type is private;
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61 type Card_PIN_Type is private;
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62 type ATM_Card_Type is private;
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63
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64 task type ATM_Keyboard_Task is
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65 entry Cancel_Pressed;
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66 end ATM_Keyboard_Task;
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67
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68
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69 procedure Validate_Card (Card : in ATM_Card_Type);
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70
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71 procedure Perform_Transaction (Card : in ATM_Card_Type);
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72
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73
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74 private
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75
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76 type Card_Number_Type is range 1 .. 9999;
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77 type Card_PIN_Type is range 100 .. 999;
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78
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79 type ATM_Card_Type is record
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80 Number : Card_Number_Type;
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81 PIN : Card_PIN_Type;
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82 end record;
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83
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84 end C974010_0;
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85
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86
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87 --==================================================================--
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88
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89
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90 with Report;
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91 package body C974010_0 is
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92
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93
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94
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95 -- One of these gets created as "Keyboard" for each transaction
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96 --
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97 task body ATM_Keyboard_Task is
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98 TC_Suicide : exception;
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99 Key_Pressed : Key_Enum := None;
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100 begin
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101 raise TC_Suicide; -- Simulate early, unexpected termination
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102
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103 accept Cancel_Pressed do -- queued entry call.
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104 null; --:::: user code for cancel
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105
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106 end Cancel_Pressed;
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107
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108 exception
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109 when TC_Suicide =>
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110 null; -- This is the expected test behavior
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111 when others =>
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112 Report.Failed ("Unexpected Exception in ATM_Keyboard_Task");
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113 end ATM_Keyboard_Task;
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114
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115 procedure Validate_Card (Card : in ATM_Card_Type) is
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116 begin
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117 Report.Failed ("Abortable part was executed");
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118 end Validate_Card;
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119
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120
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121 procedure Perform_Transaction (Card : in ATM_Card_Type) is
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122 begin
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123 Report.Failed ("Exception not re-raised immediately following " &
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124 "asynchronous select");
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125 end Perform_Transaction;
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126
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127
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128 end C974010_0;
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129
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130
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131 --==================================================================--
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132
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133
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134 with Report;
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135 with ImpDef;
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136
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137 with C974010_0; -- Automated teller machine abstraction.
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138 use C974010_0;
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139
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140 procedure C974010 is
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141
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142 Card_Data : ATM_Card_Type;
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143 TC_Tasking_Error_Handled : Boolean := false;
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144
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145 begin -- Main program.
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146
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147 Report.Test ("C974010", "Asynchronous Select: Trigger is a call to a " &
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148 "task entry of a task that is already completed");
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149
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150
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151 declare
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152 -- Create the task for this transaction
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153 Keyboard : C974010_0.ATM_Keyboard_Task;
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154 begin
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155
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156 -- Ensure the task is already completed before calling
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157 --
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158 while not Keyboard'terminated loop
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159 delay ImpDef.Minimum_Task_Switch;
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160 end loop;
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161
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162 -- --
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163 -- Asynchronous select is tested here --
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164 -- --
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165
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166 select
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167
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168 Keyboard.Cancel_Pressed;
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169
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170 raise Transaction_Canceled; -- Should not be executed.
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171
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172 then abort
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173
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174 -- Since the triggering call is not queued the abortable part
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175 -- should not be executed.
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176 --
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177 Validate_Card (Card_Data);
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178
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179 end select;
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180 --
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181 -- The propagated exception is re-raised here.
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182
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183 Perform_Transaction(Card_Data); -- Should not be reached.
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184
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185 exception
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186 when Transaction_Canceled =>
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187 Report.Failed ("Triggering alternative sequence of statements " &
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188 "executed");
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189 when Tasking_Error =>
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190 -- This is the expected test path
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191 TC_Tasking_Error_Handled := true;
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192 when others =>
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193 Report.Failed ("Wrong exception raised: ");
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194 end;
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195
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196
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197 if not TC_Tasking_Error_Handled then
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198 Report.Failed ("Tasking_Error not properly propagated");
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199 end if;
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200
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201 Report.Result;
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202
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203 exception
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204 when Tasking_Error =>
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205 Report.Failed ("Tasking_Error propagated to wrong handler");
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206 Report.Result;
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207
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208
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209 end C974010;
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